NOAA S-57 chart cell
Atchafalaya Bay to Lower Atchafalaya River
US4LA1FI
- Usage band
- Approach · code 4
- Current edition
- 4.0
- Features
- 2,659
- S-57 layers
- 54
- Published
- Apr 8, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.70000° N
- South
- 29.40000° N
- West
- 91.50000° W
- East
- 91.20000° W
- Center
- 29.55000° N, 91.35000° W
- Bounds area
- 282 sq nm
- Feature density
- 9.4212 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 49.2
- Smallest layer
- 1
- Largest layer
- 394
- Area sq km
- 968
- Features per sq km
- 2.74677
- COALNE Coastline 394
- LNDRGN Land region 364
- DEPCNT Depth contour 285
- DEPARE Depth area 280
- LNDARE Land area 166
- RIVERS River 163
- SLCONS Shoreline construction 102
- DAYMAR 101
- BCNLAT Lateral beacon 85
- LIGHTS Light 67
- OBSTRN Obstruction 58
- M_QUAL Data quality 53
- SBDARE Seabed area 50
- SEAARE Sea area 45
- PILPNT 42
- BCNSPP Special purpose beacon 38
- CANALS 36
- VEGATN 30
- DYKCON 29
- PIPARE 24
Nearby Chart Cells
Approach usage band
Current Edition Files
The NOAA ZIP archive is the upstream source for this chart cell; the other files are Open Ships generated derivatives for web and GIS use.
- Original NOAA ZIP archive https://www.charts.noaa.gov/ENCs/US4LA1FI.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4LA1FI/4.0/US4LA1FI.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1FI/4.0/US4LA1FI.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1FI/4.0/US4LA1FI.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1FI/4.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 4.0 | Apr 8, 2026 | metadata.json |